Ok I did the WT on the Tahitian and the Niagra by Caldera. I have to say, although I know the the HS name is the most precious names in Hot Tubs, the Caldera has it beat in terms of features and performance for the price.
I think I am going with the Niagra for these reasons.
1. Seats 7 with a large foot well so you arent playing footsy.
2. Can take the jets off and place the in other seats. I tried this and it made the other seat feel like a different seat altogether.
3. Outside and inside lighting
4. More jets that are also more powerful
5. Can turn on the bubbler - sends air bubbles through the jets and the whole tub starts to bubble
6. In the foot well there is a raised panel that you brace yourself which makes it nice
7. Nice neck massage in the captian chair
8. The jets seem to really hit the muscles whereas the Vanguard had those 2 moto massage jets that really didn't feel like it was hitting the right spot.
9. Comes with the OZ, cover, and lift.
10. Two pumps instead of one
Nice about the Vanguard -
1. Better foot jet
2. 100% filtration - no bypass
3. 2 year longer warranty on the cabinet (although they say it is the exact same cabinet but with a different name)